Update the 2024.1 release notes configuration to build from unmaintained/2024.1. Change-Id: If6c53a6dd027e054039a33b5ab4302f7917d90df Signed-off-by: OpenStack Release Bot <infra-root@openstack.org> Generated-By: openstack/project-config:roles/copy-release-tools-scripts/files/release-tools/change_reno_branch_to_unmaintained.sh